[1.7.2] Custom Armor Crashed

I made a custom armor but Minecraft crashed after I clicked on the creative tab that the armor is in.

Here's the armor

package com.chiyin.FractureiTem.armor;

import net.minecraft.client.renderer.texture.IIconRegister;
import net.minecraft.entity.Entity;
import net.minecraft.item.ItemArmor;
import net.minecraft.item.ItemStack;

import com.chiyin.FractureiTem.FractureiTem;

public class armor1 extends ItemArmor{

private String [] armourTypes = new String [] {"helmet1", "chestplate1", "leggings1", "boots1"};

public armor1(ArmorMaterial p_i45325_1_, int p_i45325_2_, int p_i45325_3_) {
	super(p_i45325_1_, p_i45325_2_, p_i45325_3_);

}

@Override
public String getArmorTexture(ItemStack itemstack, Entity entity, int slot, String layer){
	if(itemstack.getItem().equals(FractureiTem.helmet1)|| itemstack.getItem().equals(FractureiTem.chestplate1)|| 
			itemstack.getItem().equals(FractureiTem.boots1)){
		return "chiyin:textures/armor/armor1_1.png";
	}
	if(itemstack.getItem().equals(FractureiTem.leggings1)){
		return "chiyin:textures/armor/armor1_2.png";
	}
	else return null;
}

@Override
public void registerIcons(IIconRegister reg){
	if(this == FractureiTem.helmet1)
		this.itemIcon = reg.registerIcon("chiyin:helmet1");
	if(this == FractureiTem.chestplate1)
		this.itemIcon = reg.registerIcon("chiyin:chestplate1");
	if(this == FractureiTem.leggings1)
		this.itemIcon = reg.registerIcon("chiyin:leggings1");
	if(this == FractureiTem.boots1)
		this.itemIcon = reg.registerIcon("chiyin:boots1");
}
}

Here's the core file

public static Item helmet1 = new armor1(ItemArmor.ArmorMaterial.CLOTH, 5, 0).setCreativeTab(FractureiTemTabArmor);
public static Item chestplate1 = new armor1(ItemArmor.ArmorMaterial.CLOTH, 5, 0).setCreativeTab(FractureiTemTabArmor);
public static Item leggings1 = new armor1(ItemArmor.ArmorMaterial.CLOTH, 5, 0).setCreativeTab(FractureiTemTabArmor);
public static Item boots1 = new armor1(ItemArmor.ArmorMaterial.CLOTH, 5, 0).setCreativeTab(FractureiTemTabArmor);

GameRegistry.registerItem(helmet1, "helmet1");
	GameRegistry.registerItem(chestplate1, "chestplate1");
	GameRegistry.registerItem(leggings1, "leggings1");
	GameRegistry.registerItem(boots1, "boots1");

RenderingRegistry.addNewArmourRendererPrefix("5");

and last, the crash report

---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 14年6月27日 下午3:33
Description: Rendering item

java.lang.NullPointerException: Rendering item
at net.minecraft.client.renderer.entity.RenderItem.renderIcon(RenderItem.java:733)
at net.minecraft.client.renderer.entity.RenderItem.renderItemIntoGUI(RenderItem.java:493)
at net.minecraft.client.renderer.entity.RenderItem.renderItemAndEffectIntoGUI(RenderItem.java:560)
at net.minecraft.client.gui.inventory.GuiContainer.func_146977_a(GuiContainer.java:291)
at net.minecraft.client.gui.inventory.GuiContainer.drawScreen(GuiContainer.java:118)
at net.minecraft.client.renderer.InventoryEffectRenderer.drawScreen(InventoryEffectRenderer.java:44)
at net.minecraft.client.gui.inventory.GuiContainerCreative.drawScreen(GuiContainerCreative.java:672)
at net.minecraft.client.renderer.EntityRenderer.updateCameraAndRender(EntityRenderer.java:1145)
at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1024)
at net.minecraft.client.Minecraft.run(Minecraft.java:912)
at net.minecraft.client.main.Main.main(Main.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.client.renderer.entity.RenderItem.renderIcon(RenderItem.java:733)
at net.minecraft.client.renderer.entity.RenderItem.renderItemIntoGUI(RenderItem.java:493)

-- Item being rendered --
Details:
Item Type: com.chiyin.FractureiTem.armor.armor1@1e3b094
Item Aux: 0
Item NBT: null
Item Foil: false
Stacktrace:
at net.minecraft.client.renderer.entity.RenderItem.renderItemAndEffectIntoGUI(RenderItem.java:560)
at net.minecraft.client.gui.inventory.GuiContainer.func_146977_a(GuiContainer.java:291)
at net.minecraft.client.gui.inventory.GuiContainer.drawScreen(GuiContainer.java:118)
at net.minecraft.client.renderer.InventoryEffectRenderer.drawScreen(InventoryEffectRenderer.java:44)
at net.minecraft.client.gui.inventory.GuiContainerCreative.drawScreen(GuiContainerCreative.java:672)

-- Screen render details --
Details:
Screen name: net.minecraft.client.gui.inventory.GuiContainerCreative
Mouse location: Scaled: (192, 45). Absolute: (385, 388)
Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityClientPlayerMP['Player187'/370, l='MpServer', x=-19.98, y=82.62, z=329.29]]
Chunk stats: MultiplayerChunkCache: 224, 225
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options: 
Level spawn location: World: (-20,64,256), Chunk: (at 12,4,0 in -2,16; contains blocks -32,0,256 to -17,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 210942 game time, 108686 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 125 total; [EntityBat['Bat'/275, l='MpServer', x=32.53, y=29.57, z=397.25], EntityZombie['Zombie'/274, l='MpServer', x=46.50, y=31.00, z=399.50], EntityPig['Pig'/273, l='MpServer', x=45.50, y=76.00, z=374.31], EntityCreeper['Creeper'/272, l='MpServer', x=39.00, y=53.00, z=381.56], EntitySkeleton['Skeleton'/283, l='MpServer', x=51.50, y=14.00, z=252.50], EntityPig['Pig'/287, l='MpServer', x=56.50, y=71.00, z=269.31], EntityPig['Pig'/286, l='MpServer', x=55.94, y=71.00, z=266.97], EntityPig['Pig'/258, l='MpServer', x=37.66, y=66.00, z=279.47], EntityPig['Pig'/259, l='MpServer', x=42.34, y=69.00, z=274.47], EntitySkeleton['Skeleton'/262, l='MpServer', x=50.30, y=36.00, z=298.70], EntitySkeleton['Skeleton'/263, l='MpServer', x=44.53, y=41.00, z=295.88], EntityZombie['Zombie'/260, l='MpServer', x=50.47, y=42.00, z=299.03], EntityZombie['Zombie'/261, l='MpServer', x=47.50, y=41.00, z=298.50], EntityBat['Bat'/266, l='MpServer', x=25.09, y=37.00, z=313.03], EntityZombie['Zombie'/267, l='MpServer', x=42.91, y=55.00, z=347.31], EntityCreeper['Creeper'/264, l='MpServer', x=47.13, y=41.00, z=302.22], EntityBat['Bat'/265, l='MpServer', x=36.75, y=46.10, z=310.53], EntityPig['Pig'/270, l='MpServer', x=43.50, y=73.00, z=362.69], EntityZombie['Zombie'/271, l='MpServer', x=39.00, y=31.00, z=379.56], EntityPig['Pig'/268, l='MpServer', x=35.47, y=72.00, z=336.56], EntityBat['Bat'/269, l='MpServer', x=28.16, y=47.26, z=364.50], EntityBat['Bat'/288, l='MpServer', x=51.94, y=39.10, z=281.47], EntityBat['Bat'/289, l='MpServer', x=54.25, y=42.10, z=294.38], EntityZombie['Zombie'/290, l='MpServer', x=56.84, y=38.00, z=303.84], EntitySpider['Spider'/291, l='MpServer', x=54.72, y=40.00, z=307.81], EntityBat['Bat'/292, l='MpServer', x=60.69, y=38.39, z=302.50], EntityBat['Bat'/294, l='MpServer', x=47.63, y=23.23, z=350.69], EntityPig['Pig'/295, l='MpServer', x=59.94, y=71.00, z=341.53], EntityChicken['Chicken'/296, l='MpServer', x=58.47, y=82.00, z=383.47], EntitySpider['Spider'/297, l='MpServer', x=49.50, y=54.00, z=396.50], EntityZombie['Zombie'/298, l='MpServer', x=55.50, y=57.00, z=395.50], EntityCreeper['Creeper'/299, l='MpServer', x=58.50, y=60.00, z=386.50], EntitySkeleton['Skeleton'/300, l='MpServer', x=59.50, y=60.00, z=385.50], EntityBat['Bat'/301, l='MpServer', x=47.50, y=54.85, z=394.31], EntitySpider['Spider'/303, l='MpServer', x=50.34, y=61.00, z=402.72], EntityBat['Bat'/100, l='MpServer', x=-98.72, y=16.10, z=337.00], EntityZombie['Zombie'/99, l='MpServer', x=-99.50, y=51.00, z=312.50], EntitySheep['Sheep'/106, l='MpServer', x=-97.19, y=71.00, z=387.50], EntityBat['Bat'/104, l='MpServer', x=-99.13, y=14.92, z=381.84], EntityBat['Bat'/105, l='MpServer', x=-94.47, y=17.16, z=403.75], EntityBat['Bat'/117, l='MpServer', x=-87.50, y=11.82, z=402.03], EntityBat['Bat'/116, l='MpServer', x=-85.53, y=12.33, z=410.75], EntitySheep['Sheep'/115, l='MpServer', x=-86.50, y=71.00, z=393.19], EntityZombie['Zombie'/114, l='MpServer', x=-98.06, y=38.00, z=329.41], EntityBat['Bat'/113, l='MpServer', x=-81.53, y=14.98, z=263.66], EntityZombie['Zombie'/112, l='MpServer', x=-87.78, y=15.00, z=281.28], EntityZombie['Zombie'/127, l='MpServer', x=-76.78, y=59.00, z=283.47], EntityZombie['Zombie'/126, l='MpServer', x=-76.19, y=59.00, z=282.91], EntityZombie['Zombie'/125, l='MpServer', x=-79.59, y=57.00, z=294.63], EntityZombie['Zombie'/124, l='MpServer', x=-75.88, y=58.00, z=287.84], EntityPig['Pig'/123, l='MpServer', x=-75.19, y=72.00, z=270.78], EntityBat['Bat'/141, l='MpServer', x=-54.41, y=35.76, z=253.69], EntityBat['Bat'/142, l='MpServer', x=-55.69, y=35.00, z=253.44], EntityZombie['Zombie'/129, l='MpServer', x=-78.50, y=59.00, z=276.50], EntityZombie['Zombie'/128, l='MpServer', x=-78.50, y=59.00, z=279.50], EntityPig['Pig'/131, l='MpServer', x=-69.69, y=71.00, z=325.47], EntityPig['Pig'/130, l='MpServer', x=-75.16, y=78.00, z=296.03], EntityZombie['Zombie'/133, l='MpServer', x=-72.53, y=30.00, z=391.03], EntityPig['Pig'/132, l='MpServer', x=-77.38, y=63.00, z=343.78], EntityZombie['Zombie'/135, l='MpServer', x=-67.47, y=30.00, z=391.94], EntityZombie['Zombie'/134, l='MpServer', x=-75.50, y=31.00, z=386.50], EntityCreeper['Creeper'/152, l='MpServer', x=-62.50, y=35.00, z=348.50], EntityZombie['Zombie'/153, l='MpServer', x=-63.44, y=35.00, z=348.03], EntityZombie['Zombie'/154, l='MpServer', x=-68.06, y=39.00, z=345.50], EntityPig['Pig'/155, l='MpServer', x=-60.16, y=64.00, z=345.78], EntitySkeleton['Skeleton'/156, l='MpServer', x=-58.63, y=44.00, z=362.31], EntityCreeper['Creeper'/157, l='MpServer', x=-58.00, y=39.00, z=364.50], EntityPig['Pig'/158, l='MpServer', x=-53.88, y=65.00, z=360.22], EntityPig['Pig'/144, l='MpServer', x=-54.78, y=70.00, z=263.47], EntityPig['Pig'/145, l='MpServer', x=-51.91, y=72.00, z=270.22], EntityClientPlayerMP['Player187'/370, l='MpServer', x=-19.98, y=82.62, z=329.29], EntityPig['Pig'/146, l='MpServer', x=-54.81, y=72.00, z=268.47], EntityPig['Pig'/147, l='MpServer', x=-56.97, y=75.00, z=294.47], EntityPig['Pig'/148, l='MpServer', x=-49.78, y=67.00, z=307.50], EntitySkeleton['Skeleton'/149, l='MpServer', x=-53.50, y=34.00, z=334.50], EntityZombie['Zombie'/150, l='MpServer', x=-58.50, y=36.00, z=330.50], EntityPig['Pig'/151, l='MpServer', x=-65.50, y=69.00, z=325.31], EntityCreeper['Creeper'/171, l='MpServer', x=-34.66, y=61.00, z=340.00], EntityPig['Pig'/170, l='MpServer', x=-34.69, y=69.00, z=336.47], EntityPig['Pig'/169, l='MpServer', x=-41.84, y=70.00, z=304.03], EntityPig['Pig'/168, l='MpServer', x=-42.88, y=67.00, z=286.13], EntitySquid['Squid'/173, l='MpServer', x=-35.66, y=62.34, z=370.50], EntityPig['Pig'/172, l='MpServer', x=-42.19, y=66.00, z=354.16], EntityPig['Pig'/167, l='MpServer', x=-34.22, y=70.00, z=252.34], EntityPig['Pig'/166, l='MpServer', x=-34.72, y=74.00, z=259.50], EntitySkeleton['Skeleton'/186, l='MpServer', x=-31.50, y=23.00, z=372.50], EntityBat['Bat'/187, l='MpServer', x=-22.25, y=31.10, z=388.75], EntityPig['Pig'/184, l='MpServer', x=-24.53, y=70.00, z=336.31], EntityPig['Pig'/185, l='MpServer', x=-21.50, y=72.00, z=354.69], EntitySkeleton['Skeleton'/190, l='MpServer', x=-18.00, y=52.00, z=396.50], EntityZombie['Zombie'/191, l='MpServer', x=-13.47, y=46.00, z=390.16], EntityZombie['Zombie'/188, l='MpServer', x=-19.50, y=61.00, z=386.50], EntityZombie['Zombie'/189, l='MpServer', x=-21.50, y=61.00, z=388.50], EntitySkeleton['Skeleton'/182, l='MpServer', x=-16.50, y=65.00, z=284.50], EntityCreeper['Creeper'/183, l='MpServer', x=-22.56, y=66.00, z=274.97], EntityPig['Pig'/181, l='MpServer', x=-25.16, y=66.00, z=281.84], EntityPig['Pig'/207, l='MpServer', x=-2.50, y=73.00, z=301.69], EntityPig['Pig'/223, l='MpServer', x=5.97, y=67.00, z=261.88], EntitySkeleton['Skeleton'/212, l='MpServer', x=-10.88, y=46.00, z=401.50], EntitySkeleton['Skeleton'/213, l='MpServer', x=-10.75, y=44.00, z=402.84], EntityCreeper['Creeper'/214, l='MpServer', x=-12.63, y=44.00, z=404.72], EntityCreeper['Creeper'/215, l='MpServer', x=-10.66, y=40.00, z=409.06], EntityPig['Pig'/208, l='MpServer', x=-2.84, y=72.00, z=288.44], EntityBat['Bat'/209, l='MpServer', x=7.97, y=44.39, z=377.66], EntitySkeleton['Skeleton'/210, l='MpServer', x=-10.53, y=44.00, z=386.78], EntityWitch['Witch'/211, l='MpServer', x=-15.50, y=53.00, z=389.50], EntityChicken['Chicken'/239, l='MpServer', x=19.53, y=67.00, z=250.47], EntityZombie['Zombie'/232, l='MpServer', x=6.50, y=12.00, z=359.50], EntityZombie['Zombie'/231, l='MpServer', x=6.50, y=12.00, z=360.50], EntityPig['Pig'/230, l='MpServer', x=13.72, y=75.00, z=349.22], EntityPig['Pig'/229, l='MpServer', x=11.47, y=73.00, z=343.66], EntityZombie['Zombie'/228, l='MpServer', x=10.34, y=47.00, z=345.34], EntitySkeleton['Skeleton'/227, l='MpServer', x=5.88, y=52.00, z=307.47], EntitySkeleton['Skeleton'/226, l='MpServer', x=5.84, y=51.00, z=306.34], EntitySkeleton['Skeleton'/225, l='MpServer', x=14.16, y=52.00, z=307.50], EntityPig['Pig'/224, l='MpServer', x=12.50, y=67.00, z=274.31], EntityBat['Bat'/249, l='MpServer', x=21.75, y=27.10, z=409.34], EntityZombie['Zombie'/246, l='MpServer', x=18.50, y=55.00, z=369.50], EntityBat['Bat'/247, l='MpServer', x=39.72, y=11.82, z=400.56], EntityPig['Pig'/244, l='MpServer', x=19.50, y=77.00, z=333.50], EntityZombie['Zombie'/245, l='MpServer', x=30.53, y=25.00, z=382.97], EntityPig['Pig'/242, l='MpServer', x=18.69, y=70.00, z=300.47], EntityPig['Pig'/243, l='MpServer', x=27.91, y=71.00, z=318.25], EntityPig['Pig'/240, l='MpServer', x=18.81, y=67.00, z=265.97], EntityPig['Pig'/241, l='MpServer', x=35.03, y=66.00, z=279.97]]
Retry entities: 0 total; []
Server brand: fml,forge
Server type: Integrated singleplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.addWorldInfoToCrashReport(WorldClient.java:412)
at net.minecraft.client.Minecraft.addGraphicsAndWorldToCrashReport(Minecraft.java:2523)
at net.minecraft.client.Minecraft.run(Minecraft.java:934)
at net.minecraft.client.main.Main.main(Main.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Windows 8 (x86) version 6.2
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 774409128 bytes (738 MB) / 1046937600 bytes (998 MB) up to 1046937600 bytes (998 MB)
JVM Flags: 3 total; -Xincgc -Xmx1024M -Xms1024M
AABB Pool Size: 16965 (950040 bytes; 0 MB) allocated, 3458 (193648 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP v9.03 FML v7.2.211.1121 Minecraft Forge 10.12.2.1121 4 mods loaded, 4 mods active
mcp{9.03} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{7.2.211.1121} [Forge Mod Loader] (forgeSrc-1.7.2-10.12.2.1121.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{10.12.2.1121} [Minecraft Forge] (forgeSrc-1.7.2-10.12.2.1121.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
cyFractureiTem{1.0} [Fracture iTem] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Launched Version: 1.6
LWJGL: 2.9.0
OpenGL: Intel(R) HD Graphics 4400 GL version 4.2.0 - Build 10.18.10.3304, Intel
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: ?体中文 (中)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 3494 (195664 bytes; 0 MB) allocated, 1070 (59920 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

Sorry for my bad english, please help!