Minecraft修改Java编译错误

我正在尝试为minecraft制作一个新的模块。这是我的密码：

mod_Block.java

package net.minecraft.src;
import java.util.random;

public class mod_Block extends BaseMod
{
    public static final Block sunBlock = new     BlockSun(100,0).setBlockName("sun").setLightValue(2.0F);

    public mod_Block()
    {
        ModLoader.RegisterBlock(sunBlock);
        blockSun.blockIndexInTexture = ModLoader.addOverride("/terrain.png","/block.png");
        ModLoader.AddName(sunBlock,"Sun");

        ModLoader.AddRecipe(new ItemStack(sunBlock, 1), new Object [] {
            "**", Character.valueOf('*'), Block.dirt
        });
    }

    public String Version()
    {
        return "3.14159265";
    }
}

blockSun.blockIndexInTexture = ModLoader.addOverride("/terrain.png","/block.png");

BlockSun.java

package net.minecraft.src;
import java.util.random;

public class BlockSun extends Block
{
    protected BlockSun (int i, int j)
    {
        super (i,j,Material.glass);
    }

    public int quantityDropped (int i, Random random)
    {
        return 0;
    }
}

但编译器说：

src/minecraft/net/minecraft/src/BlockSun.java:2:找不到符号 符号：类util 位置：包java 导入java.util； ^

src/minecraft/net/minecraft/src/BlockSun.java:11:找不到符号 符号：随机类 位置：class net.minecraft.src.BlockSun 公共整数数量下降（整数i，随机） ^

src/minecraft/net/minecraft/src/mod_Block.java:2:找不到符号 符号：类util 位置：包java 导入java.util； ^

src/minecraft/net/minecraft/src/mod_Block.java:11:找不到符号 符号：可变区块太阳 位置：class net.minecraft.src.mod_块 blockSun.blockIndexInTexture=ModLoader.addOverride（“/terrain.png”，“/block.png”）； ^

---

如果您能帮助我，我将非常感激，谢谢。

Java区分大小写：

Java.util.Random

---

另外，阅读Java的命名约定对您也有好处：

尝试更改mod_Block.Java中的这一行

package net.minecraft.src;
import java.util.random;

public class mod_Block extends BaseMod
{
    public static final Block sunBlock = new     BlockSun(100,0).setBlockName("sun").setLightValue(2.0F);

    public mod_Block()
    {
        ModLoader.RegisterBlock(sunBlock);
        blockSun.blockIndexInTexture = ModLoader.addOverride("/terrain.png","/block.png");
        ModLoader.AddName(sunBlock,"Sun");

        ModLoader.AddRecipe(new ItemStack(sunBlock, 1), new Object [] {
            "**", Character.valueOf('*'), Block.dirt
        });
    }

    public String Version()
    {
        return "3.14159265";
    }
}

blockSun.blockIndexInTexture = ModLoader.addOverride("/terrain.png","/block.png");

为此：

sunBlock.blockIndexInTexture = ModLoader.addOverride("/terrain.png","/block.png");